Robin EX17 runs rough

[dodgeman568]

I have a Robin EX17 motor that runs fine when i remove the air filter box from the carb, but when the air filter assembly is bolted on the engine has a miss. the carb has no adjustment. Any ideas on what i should check out first?

 

[Doc Sprocket]

Is the air filter dirty?

 

[dodgeman568]

The filter is clean It will miss even without the filter it runs fine without the filter box

 

[landuse]

Have you pulled the carb off and made sure that it is really clean. All the tiny holes are open?

 

[Electritech]

Check to make sure that the air box doesn't interfere with any of the linkages. I had a powerwasher that acted a lot like that. Turned out the choke linkage got bent just enough that it was always partially on.